Calculator



FIG. 1 is a left end elevational view of a calculator showing my new design;

FIG. 2 is a right end elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view; and

FIG. 6 is a top plan view. 

The ornamental design for a calculator, substantially as shown and described. 